A private investor has bought this 11-story apartment tower occupying a 50-by-200-foot parcel, with 32,600 square feet in air rights. The seller, who had filed for Chapter 11 three times, has retained a 3,000-square-foot adjoining community facility. The building, completed in 2007, has 23 apartments — 15 two-bedrooms, seven three-bedrooms and one five-bedroom penthouse duplex — with wood floors, granite countertops and 10.8-foot-high ceilings.